Abstract
In this paper we study the inclusive production of the charmed baryon Λ +c in interactions of 40–70 GeV/c neutrons with protons of hydrogen target. The experiment has been performed with the use of magnetic spectrometer BIS-2 located in the neutron beam of Serpukhov accelerator. The signal of Λ +c is observed in the effective mass spectra of Λ°π+π+π−. After the removal of interactions occurring on the container of liquid hydrogen, the signal consists of 14 combinations corresponding to ≈4 standard deviations of background. Its mean value is 2262 MeV/c2, width of the bin containing signal is 20 MeV/c2. On the basis of this signal we determine the value of cross section of Λ +c production times the branching ratio of its observed decay modeσ. Br (Λ +c → Λ°π+π+π−)=0·26±0·11 μb in the kinematic region ofx F>0·5 andp T<1 GeV/c.
Similar content being viewed by others
References
Cazzoli E. G. et al.: Phys. Rev. Lett.34 (1975) 1125.
Gurtu A.: Preprint EP/84-102. CERN, Geneva, 1984.
Caso C.: Preprint EP/85-180. CERN, Geneva, 1985.
Aleev A. N. et al.: Z. Phys. C23 (1984) 333.
Aleev A. N. et al.: Preprint D1-86-422. JINR Dubna, 1986.
MacDermott M. et al.: Phys. Lett. B184 (1987) 108.
Eichner G. et al.: Preprint 1-80-644. JINR, Dubna, 1980.
Borzunov J. T. et al.: Preprint 8-83-191. JINR, Dubna, 1983.
Guskov B. N. et al.: Preprint P1-86-248. JINR, Dubna, 1986.
Pene O. et al.: Nucl. Phys. B12 (1969) 415.
Aleev A. N. et al.: Preprint P1-82-353. JINR, Dubna, 1982.
Blobel V. et al.: Nucl. Phys. B69 (1974) 454.
Alpgärd K. et al.: Nucl. Phys. B103 (1976) 234.
Ammosov V. V. et al.: Nucl. Phys. B115 (1976) 269.
Chapman J. W. et al.: Phys. Lett. B47 (1973) 463.
Brick D. et al.: Nucl. Phys. B164 (1980) 1.
Bowcock T. et al.: Phys. Rev. Lett.55 (1985) 923.
Boreskov K. G. et al.: Yad. Fiz.37 (1983) 174.
Kaidalov A. B. et al.: Yad. Fiz.43 (1986) 1545.
Chauvat P. et al.: Preprint EP/87-184. CERN, Geneva, 1987.
Duffy M. E. et al.: Phys. Rev. Lett.55 (1985) 1816.
Cobbaert H. et al.: Phys. Lett. B191 (1987) 456.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Vecko, M., Novák, M., Hladký, J. et al. Production of the charmed baryon Λ +c in neutron-proton interactions. Czech J Phys 39, 297–307 (1989). https://doi.org/10.1007/BF01597781
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF01597781